ADP3155 Datasheet PDF | Analog Devices

Analog Devices ADP3155

The ADP3155 is a highly efficient synchronous buck switching regulator controller optimized for converting the 5 V main supply into the core supply voltage required by the Pentium III and other high performance processors. The ADP3155 uses an internal 5-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 1.3 V and 3.5 V. The ADP3155 uses a currentmode, constant off-time architecture to drive two external Nchannel MOSFETs at a programmable switching frequency that can be optimized for size and efficiency.

Part No.	ADP3155
Datasheet	ADP3155 Download
Manufacturer	Analog Devices
Description	5-Bit Programmable Triple Power Supply Controller
Buy	Stock & Price

FEATURES

Active Voltage Positioning with Gain and Offset Adjustment Optimal Compensation for Superior Load Transient Response VRM 8.2, VRM 8.3 and VRM 8.4-Compliant 5-Bit Digitally Programmable 1.3 V to 3.5 V Output Dual N-Channel Synchronous Driver Two Onboard Linear Regulator Controllers Total Output Accuracy ؎1% Over Temperature High Efficiency, Current-Mode Operation Short Circuit Protection Overvoltage Protection Crowbar Protects Microprocessors, with No Additional External Components Power Good Output TSSOP-20 Package

APPLICATIONS

Desktop PC Power Supplies for: Pentium II and Pentium III Processor Families AMD-K6 Processors VRM Modules

GENERAL DESCRIPTION

R VT2 CT CMP ADP3155 DAC 1.20V It also uses a unique supplemental regulation technique called active voltage positioning to enhance load transient performance. Active voltage positioning results in a dc/dc converter that meets the stringent output voltage specifications for Pentium II and Pentium III processors, with the minimum number of output capacitors and the smallest footprint.